Construction of tube joints for fuel economizers for steam boilers and the like



Patented Mar. 17, 1925.

UNITED STATES PATENT OFFICE.

HARRY SLADE, OE' VAKEFIELDETTGLANlS-,HEQNOR OF ONE-HALF TO FRANCIS WILLIAM GREEN, OF VAKEFIELD, ENGLAND.

CONSTRUCTION OF TUBE JOINTS FOR FUEL ECONOMIZERS FOR STEAM BOILERS AND THE LIKE.

Serial No. 485,241.

(GRANTED UNDER THE PROVISIONS 0F THE ACT 0F MARCH 3,1921, 41 STAT. L., 1313.)

To all fwromc' may concern:

Be it known that HARRY Snam-1, a subject of the King of Great Britain, residing at llalelield, Yorkshire, England, has invented cert-ain new and useful Iuijufovements in the Construction of Tube Joints for Fuel Ileonomizers for Steam Boilers and the like (for which I have filed application in Great Britain April 20, 1916, Patent No. 101,078), of which the following is a specilfication.

The object of this invention is to construct the joint between a header and tube so that perfect safety is obtained for high pressures and that no machined part of the tube comes in Contact with the gases.

My invention will be clearly understood from the following description aided by the annexed drawings in which Figure 1 isa section of top and bottom headers of a fuel economizer with a tube (broken) connected with same.

Figure 2 is a section on the line a a of Figure 3.

Figure Figure 1.

For the purpose of my invention the ends 1, 2 of the tube 3 are tapered, the inner ends of the tapers having a shoulder 11, 5 as usual.

The top and bottom headers G, l are provided with lugs, bosses or the like 8 having screw threaded holes 9 and preferably four for each tube 3.

I construct a ring plate 10 having holes to correspond to the holes 9 in the lugs or bosses 8 and preferably of a shape correspending externally to the shape of the header 6 or 7 surrounding the tube 3 and the inside of this ring plate 1() is of a diameter exactly equal to or slightly larger than the largest external diameter of the tube so that such ring plate 10 can be passed along the tube 3 from either or one end, Vand in one surface from one edge of the ring plate 10 I form a groove or recess 11 the recess or groove 11 being on the side next to the header 6 or 7.

Between the ring plate 10 and the header er T and in the groove 11 I position a split 3 is a section on the line Y) el of the tube 3 and on bolting the ring plate 1() to the header by a bolt 13 the split metal ring 12 is held in position and firmly holds the tube 3 in -place the machined parts of the tube being protected from the eli'ect of the gases.

-What I do claim as my invention and desire to secure by Letters Patent is 1. A fuel economizer comprising in combination, a tube, a hollow member at one end of said. tube whereby the latter may be con-- nected to an adjacent tube, a hollow member at the opposite end of said tube whereby the latter may be connected to an adjacent tube, the exteriors of the opposite ends of said tube being tapered, each of said hollow inenr bers being provided with a conical seat adapted to receive a tapering end of said tube, a pair of shoulders each provided at the larger end of the taper at each end of said tube, a pair of split rings each adapted to engage a corresponding one of said shoulders and to overlie and seal a ciu'respoiuling one of the joints between 'the tapered ends of said tube and said members, clairuping` ele inents each adapted to engage a ernresponding one of said rings to force the latter into joint-sealing position, and means for applying pressure to said clamping lelements and for holding them in clamping position.

2. In a device of the `class described, in combination, a tube, a hollow member at one end of said tube whereby the latter may be connected to an adjacenty tube, a hollow member at the opposite end of saidv tube whereby the latter may be connected to an adjacent tube, the exteriors of the opposite ends of said tube being tapered, each of said hollow members being provided with a conical seat adapted to receive a tapering end of said tube, a pair of shoulders each provided at the larger .end of the taper at each end of said tube, apair of split ringseach adapted to engage a corresponding one of said shoulders and to overlie a corresponding one of the joints between the tapered elldsof said tube and said. members, clamp- In testimony whereof I have hereunto eet 1110 element-s each ada ted t0 enUaO'e a, oorf5 D 'D my hand .in presence of two Subscribing Witreeponding one of Suid rings t0 force the HGSSGS. latter mto jolnt-engagmg posltlon, and HARRY SLADE. means for applylng pl'essuretto said clamp- Wltnesses:

ing elements and for holding them in clamp- JAMES HEPTOMHALL, lng posltlon.

VILLIAM HENRY MORRIS. 

